ALEXANDRIA, Va. (AP) — A Kansas native convicted of leading an all-female battalion of the Islamic State group had a long history of monstrous behavior that included sexual and physical abuse of her own children, family members said in court filings.

Prosecutors cited the abuse allegations in seeking a maximum 20-year sentence for Allison Fluke-Ekren, 42, when she is sentenced Nov. 1 for providing material support to the Islamic State group.

"Allison Fluke-Ekren brainwashed young girls and trained them to kill. She carved a path of terror, plunging her own children into unfathomable depths of...